I have found some adjustable cam gears in USA which are designed for 1994-2004 Mitsi Galant 2.4L SOHC engine, they are 5 bolt camgears. They sell them seperately, but they say that for DOHC applications you can use 2 of them.

Do you think that these cam gears would go onto/work on the 6A13TT engine?. And how many bolts are the factory cam gears?